Yeongsu Bak, Young Jae Lee, and Kyo-Beum Lee, "Dynamic Characteristic Improvement of Phase-Shift Full-Bridge Center-Tapped Converters Using a Model Predictive Control," IEEE Transactions on Industrial Electronics, in press. -SCI > Paper

This paper proposes a dynamic characteristic improvement of phase-shift full-bridge center-tapped (PSFB-CT) converter using a model predictive

control (MPC) method. The PSFB-CT converter is widely used for low voltage DC/DC converters (LDC) in electric vehicles (EVs). In general, its

output voltage is a control object which is usually controlled using a proportional-integral (PI) control-based output voltage controller and current

controller. However, it has a disadvantage such as undesirable dynamic characteristic of the PSFB-CT converter and the necessity of gain tuning.

Especially, if the gain of the PI control is increased to improve the dynamic characteristic of the PSFB-CT converter, an overshoot of the output

voltage can occur. In this paper, the advanced voltage control using the MPC method is proposed to improve the dynamic characteristic of the PSFB-

CT converter without overshoot of the output voltage. As a result, not only fast dynamic characteristic but also robustness from a sudden change of

load impedance. The effectiveness of the proposed MPC method was proved by the simulation and experimental results.